From:	King, KJ (Ken) 
Sent:	22 October 2001 10:39
To:	Stefan.Thuerey@esa.int; patrice.couzin@space.alcatel.fr; Keithrobert_Hibberd@vzmta01.netfr.alcatel.fr
Cc:	Anders.Elfving@esa.int; Andrei.Oganessian@esa.int; Astrid.Heske@esa.int; Farid.Guettache@esa.int; John.Dodsworth@esa.int; Karim.Mellab@esa.int; FWECHSLE@estec.esa.nl; fgr@iac.es; jhl@iac.es; charra@ias.u-psud.fr; orfei@ifsi.rm.cnr.it; stassi@isn.in2p3.fr; beney@lal.in2p3.fr; fgb@mpe.mpg.de; ohb@mpe.mpg.de; King, KJ (Ken) ; Parker, DJ (Dave)  - SSTD; Swinyard, BM (Bruce) ; Long, JA (Judy) ; butler@tesre.bo.cnr.it; mmiccolis@webmail.laben.it
Subject:	Response to Action Items from Data Management WG #8
Dear all,

Here are SPIRE's answers to the CDMS #8 Actions:

AI#1
Current estimate is that SPIRE housekeeping will have approximatley 250 16 bit parameters reported every two seconds. It is possible that these will be split into up into two types of  housekeeping packet: a safety infirmation packet that could be reported every second; and a nominal housekeeping packet reported every 2 seconds 
 
AI#5
This has to be agreed for all Herschel instruments - but SPIRE prefers that the DPU time is synchronized using the SDB features

AI#6
There are no SPIRE TM packets that require action by the spacecraft within 500ms

AI#7
SPIRE will request at least 25 subfarmes per second to be available when we are the prime instrument. 
Justification for the two main operating modes are shown in the attached tables

Cheers

Ken